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Posted By

skatan on 08/23/07

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Last Edited at 08/23/07 11:58am

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Copy this code and paste it in your HTML 
  1. function hasClass(ele,cls) {
  2. 	return ele.className.match(new RegExp('(\\s|^)'+cls+'(\\s|$)'));
  3. }
  4.  
  5. function addClass(ele,cls) {
  6. 	if (!this.hasClass(ele,cls)) ele.className += " "+cls;
  7. }
  8.  
  9. function removeClass(ele,cls) {
  10. 	if (hasClass(ele,cls)) {
  11.     	var reg = new RegExp('(\\s|^)'+cls+'(\\s|$)');
  12. 		ele.className=ele.className.replace(reg,' ');
  13. 	}
  14. }
  15.  
  16. //call the functions
  17. addClass(document.getElementById("test"), "test");
  18. removeClass(document.getElementById("test"), "test")
  19. if(hasClass(document.getElementById("test"), "test")){//do something};

URL: http://www.openjs.com/scripts/dom/class_manipulation.php

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